Pump.



E. GERSTENBERG.

PUMP.

APPLICATION PVILED DEO.10,1908.

Patented Apr. 26, 1910.

SHEETS-BREST 1.

ATTORNEY.

E. GERSTENBERG.

PUMP.

APPLIOATION FILED DE0.10,190B.

Patented A111126, 1910.

2 SHEETS-SHEET 2.

ATTRNEY AnonEw a. mmm au rumamnounmixa wumnuwm ITED STATES PAlIlENT OFFICE.

ERNST GERSTENBERG, OF WASHINGTON, DISTRICT OF COLUMBIA, ASSIGNOR TO THE DEIS PUMP COMPANY, OF WASHINGTON, DISTRICT 0F COLUMBIA, A CORPORATION OF THE DISTRICT OF COLUMBIA.

PUMP.

T o all whom 'it may concern:

Be it known that I, ERNST GERSTENBERG, a citizen of the United States, residing in Washington, District of Columbia, have invented a certain `new and useful Improvement in Pumps; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to characters of reference marked thereon, which form a part of this specification.

This invention relates to pumps and it consists in certain improvements in pumps, of the nature of that patented to Philip H. Deis, under U. S. Letters Patent No. 840,919, dated January 8, 1907.

The principal object of the invention is so to construct the pump that, firstly, when used in a well of the driven type, the part corresponding to part Z) (wellpipe) in said patent need only be suiiiciently long so as properly to guide the lifting means, the water, once it clears said part, being in such case conducted upwardly by the well-casing, as is the usual custom; and that, secondly, the assembling and disassembling of the pump parts in operative condition may be effected with facility and expedition, regardless of the depth which the working part of the pump is required to assume.

Although I have devised the present invention with particular reference to a waterdrawing medium of the kind particularly indicated above, it will be understood that I am not correspondingly limited, as several of the novel features of my invention are applicable in other adaptations.

Referring to the accompanying drawing, Figure l is a View showing the improved pump, a part of the well easing and a part of the tubular member in which the plunger works being in section; Figs. 2 and 3 are vertical sectional views, on a larger scale, the rst showing the upper portion and the second the lower portion of the principal mechanism of the pump, Fig. 3 showing also in dot-anddash outline a certain key employed in assembling and disassembling the parts; Fig. 4 illustrates the key; and, Figs. 5 and 6 are a top and an underneath Specification of Letters I'atent.

Application filed December 10, 1908.

Patented Apr. 26, 1910.

Serial No. 466,844.

plan view of the anchor plug for the piston and the expander for the tubular member above-mentioned.

In said drawings, a designates the tubular well casing.

b is the tubular member above referred to which is formed relatively short, has a part thereof adapted to be expanded to seal oft' communication as between said member and the well casing, is the part in which the plunger works, and affords an anchorage for the pump piston. This tubular member is constructed substantially as follows: Referring to Fig. 2 c is a sleeve having a length approximating that of the throw of the plunger. It is threaded interiorly, at o?, at its lower end. Into it is screwed a cylindrical extension e having conical or tapering interior threading f in its upper end and conical or tapering interior threading g in its lower end. This extension is split from its lower end upwardly al suitable distance, as indicated at h, so that its lower portion is expansible, and in its lower portion it receives a conical expander e' having threading j engaging the threading g; this expander also has internal lugs le which reeeive a suitable key (to be described) for turning the expander.

The extension is surrounded by a packing Z, preferably of rubber, in its split portion, and if necessary, this may be secured on the extension by having its upper portion, which is received by an annular channel Z in the extension, wrapped with wire m (Fig. 2). Into the upper end of the extension is screwed a conical plug fa, in the form of a spider, the same having a threaded hole 0 tapped centrally therein and lugs p whereby to turn it by means of the pump plunger, as hereinafter explained. The plug is conical so that it may the more readily be entered and then screwed into the upper threaded end of the extension. Spring blades g attached by screws v' tothe lower end of the extension e, depend from said extension and converge at their lower ends, where they are suitably secured to a block 3,' these blades are normally held expanded to a diameter greater than the interior diameter of the well casing by a split ring t, and they have vertically disposed projecting teeth u which, when member l) is driven into the well casing, grip the latter and hold the member b against turning.

fu designates the pump piston and w is its i stem, the samehaving its lower end threaded and screwed into the tapped hole o of the anchor plug a, a nut being screwed onto downwardly protruding end of the stem and bearing against the underside of the nut to reinforce the threaded connection between parts w and n.

The plunger of the pump is preferably constructed as follows: y is a plunger rod made tubular for the purpose clearly indicated in the Deis patent referred to. It is screwed into aplug z in turn screwed into the upper end of a cylinder l which at its lower end is screwed into the upper end of the hollow plunger head 2 which is provided with ports 3 allowingthe liquid admission to the plunger from below and with ports 4 allowing liquiddis'charge from the plunger upwardly; the ports 3 are preferably controlled by disk valves 5 arranged on headed stems 6 screwed into the spider portion 7 of the head 2, and allowing slight vertical movement of theV valves, while the ports 4 are controlled' by bally valves 8 having limited upward movement by virtue of a' ring 9 shrunk onto or otherwise secured'to the cylinder V1. The spider Tis penetrated by stem w and may have a gland l0 to seal off liquid passage between the stem and the spider. Recesses 1l are formed in the plunger head 2 to receive the lugs p of plug n-in assembling the pump.'

In assembling the improved pump, the member b, with the expander only partly introduced thereinto, is forced down into the well casing a by means of the key l2 shown in F ig. 4, which may be a pipe having an angular slot 13 of the form shown in said figure cut therein.- Asmember bis forced downinto the casing, the blades g grip the same by means of their teeth u. The key, now receiving the lugs 7c' of the expander'in its slots 13, is made to turn the expander until the extension e expands suiiiciently to compress the packing Z tightly between said extension and the well casing, the extension being at this time held against turning by the blades g. The assembled plunger and piston, with the plug n attached to the latter, areV now introduced into the well casing, being finally received by the lsleeve c of member Z), the plug entering the upper end of extension e; the plug having` several of the threads thereof at its entering end of less diameter than the corresponding threads at the mouth of the threaded interior f of the extension e, theA plug may be entered into said extension and its threading caused to engage the threading f without difliculty. The piston coming to rest at this time, the plunger is depressed relatively thereto and then turned until the lugs penter the recesses ll, whereby the plunger is further turned to cause the plug to be screwed into the upper endof-the in they plunger results inV water entering Y through the lower part of member b past valves 'into` the plunger. And so on.'-

It will be observed that by the' improved construction-a pump is provided which can be assembled and disassembled-at any depth, while offering means serving as positive anchorage for the piston as well asto seal off` water which, having once been elevated above sleeve c, might otherwise lindfitsway back tol the well water.

Havingthus fully described my invention,

what I claim as newv and desire to secure' by Letters Patent is l'. Thefcom'bi'nation of aV tubular'V conducting member lfor the liquid to' be elevated,` another `andr shorter tubular member secured therein, an anchor plug screwed into the second member, a stem attached to the plug, a

`valved tubular plunger, and a piston'in' the plunger carried by the stem, said'plunger confining' the piston against withdrawal therefrom and saidl anchor plugI and the plunger having the one a projection and the other a recess adapted'to receive the projection, whereby to turn the vanchor plugin the second member by means -of the plunger, substantially as described.

2. The combination of a tubular member, a tubular part inclosed in said member andi having an expansible end-portion, al packing surrounding saidpart, an expander in said end-portionofsaid part, and an elastic gripping member depending` from theA tubular part, said gripping member having'a normal diameter greater than the interior diameter of the tubular memberand comprising bla-des and a split elastic annular part exerting an expanding influence on said blades, substantially as described.

3. The combination of a tubular, conducting member for the liquid to be elevated, another and relatively shorter tubular member secured in thefirst member' andhaving an upwardly opening hollow threaded portion, an exteriorly threaded conicalanchor plug screwed into thehollow portion of-'the second member and having several ofV`V its threads at its entering or smaller end. of lessdiameter than the corresponding threads at'the 'mouth of the hollow orton of the second In testimony, that I claim the foregoing, l member, a stem attached to the plug and have hereunto set my hand this fifth day of extending upwardly, a piston connected with December, 1908.

the stem, and a tubular plunger receiving ERNST GERSTENBERG. the piston and having two sets of relatively wWitnesses:

upwardly opening valved ports, substan- BENJAMIN S. MINOR,

tially as described. HUGH B. ROWLAND. 

